Mashable
Cms%252f2017%252f11%252fe41f6a9c 1cdd 9e33%252fthumb%252f00001.jpg%252foriginal.jpg?signature=rw199ejw4ewwbmmn8drcjbccsy4=&source=https%3a%2f%2fvdist.aws.mashable

This block of sand defies physics

Sand is one of the least strong materials since it only relies on internal friction for support. YouTuber Practical Engineering found that using even little reinforcements strengthened the sand.

The tension in the reinforcements creates confining pressure in the soil, which is how highway walls stay up.

Shows

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